package com.example.demo.controller;


import com.example.demo.entity.*;
import com.example.demo.event.EventProducer;
import com.example.demo.service.CommentService;
import com.example.demo.service.DiscussPostService;
import com.example.demo.service.LikeService;
import com.example.demo.service.UserService;
import com.example.demo.util.CommunityConstant;
import com.example.demo.util.CommunityUtil;
import com.example.demo.util.HostHolder;
import com.example.demo.util.RedisKeyUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import java.util.*;

@Controller
@RequestMapping("/discuss")
public class DiscussPostController implements CommunityConstant {

    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private UserService userService;

    @Autowired
    private CommentService commentService;

    @Autowired
    private LikeService likeService;

    @Autowired
    private EventProducer eventProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping("/add")
    @ResponseBody
    public String addDiscussPost(String title, String content){

        User user = hostHolder.getUser();
        if (user == null){
            return CommunityUtil.getJSONString(403,"您还没有登录哦!");
        }

        DiscussPost post = new DiscussPost();
        post.setUserId(user.getId());
        post.setTitle(title);
        post.setContent(content);
        post.setCreateTime(new Date());
        discussPostService.addDiscussPost(post);

        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(user.getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(post.getId());
        eventProducer.fireEvent(event);

        // 计算帖子的分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey, post.getId());


        //报错的情况,将来统一处理
        return CommunityUtil.getJSONString(0,"发布成功!");
    }

    @RequestMapping(path = "/detail/{discussPostId}", method = RequestMethod.GET)
    public String getDiscussPost(@PathVariable("discussPostId") int discussPostId, Model model, Page page){

        //帖子
        DiscussPost post = discussPostService.findDiscussById(discussPostId);
        model.addAttribute("post",post);

        //作者
        User user = userService.findUserById(post.getUserId());
        model.addAttribute("user",user);

        //点赞数量
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST, discussPostId);
        model.addAttribute("likeCount", likeCount);

        //点赞状态
        int likeStatus =hostHolder.getUser() == null ? 0 : likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_POST, discussPostId);
        model.addAttribute("likeStatus", likeStatus);

        //评论的分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/" + discussPostId);
        page.setRows(post.getCommentCount());

        //评论：给帖子的评论
        //回复：给评论的评论
        //评论列表
       List<Comment> commentList = commentService.findCommentsByEntity
               (ENTITY_TYPE_POST,post.getId(),page.getOffset(),page.getLimit());
        //评论VO列表
        List<Map<String,Object>> commentVoList = new ArrayList<>();
        if (commentList != null){
            for (Comment comment : commentList){
                //评论的VO
                Map<String,Object> commentVo = new HashMap<>();
                //评论
                commentVo.put("comment",comment);
                //评论的作者
                commentVo.put("user",userService.findUserById(comment.getUserId()));
                //点赞数量
                likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("likeCount", likeCount);
                //点赞状态
                likeStatus =hostHolder.getUser() == null ? 0 : likeService.findEntityLikeStatus
                        (hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("likeStatus", likeStatus);

                //回复列表
                List<Comment> replyList = commentService.findCommentsByEntity
                        (ENTITY_TYPE_COMMENT, comment.getId(), 0, Integer.MAX_VALUE);
                //回复的VO列表
                List<Map<String,Object>> replyVoList = new ArrayList<>();
                if (replyList != null){
                    for(Comment reply : replyList){
                        Map<String,Object> replyVo = new HashMap<>();
                        //回复
                        replyVo.put("reply",reply);
                        //作者
                        replyVo.put("user", userService.findUserById(reply.getUserId()));
                        //回复的目标
                        User target = reply.getTargetId() == 0 ? null : userService.findUserById(reply.getTargetId());
                        replyVo.put("target",target);

                        //点赞数量
                        likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeCount", likeCount);

                        //点赞状态
                        likeStatus =hostHolder.getUser() == null ? 0 : likeService.findEntityLikeStatus
                                (hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeStatus", likeStatus);

                        replyVoList.add(replyVo);
                    }
                }
                commentVo.put("replys",replyVoList);

                //回复的数量
            int replyCount = commentService.findCommentCount(ENTITY_TYPE_COMMENT, comment.getId());

            commentVo.put("replyCount",replyCount);

            commentVoList.add(commentVo);

            }
        }

        model.addAttribute("comments",commentVoList);

        return "/site/discuss-detail";
    }

    // 置顶
    @RequestMapping(path = "/top", method = RequestMethod.POST)
    @ResponseBody
    public String setTop(int id) {
        discussPostService.updateType(id, 1);
        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        return CommunityUtil.getJSONString(0);
    }

    // 加精
    @RequestMapping(path = "/wonderful", method = RequestMethod.POST)
    @ResponseBody
    public String setWonderful(int id) {
        discussPostService.updateStatus(id, 1);
        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        // 计算帖子的分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey, id);


        return CommunityUtil.getJSONString(0);
    }

    // 删除
    @RequestMapping(path = "/delete", method = RequestMethod.POST)
    @ResponseBody
    public String setDelete(int id) {
        discussPostService.updateStatus(id, 2);
        // 触发删帖事件
        Event event = new Event()
                .setTopic(TOPIC_DELETE)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        return CommunityUtil.getJSONString(0);
    }


}
